The demand for saddles made from leather later declined with the advent of the industrial era
The demand for halters made from leather later declined with the advent of the industrial era
The demand for feed bags made from leather later declined with the advent of the industrial era
leather
Circle P saddles are made by Winntec and are made in Austraila. They are mostly synthetic as are the Winntec line and are lighter weight that regular all leather saddles.
Bicycle saddles were originally covered in leather because plastics had not yet been invented. Most modern saddles are, nowadays, made from composite (man-made) materials, either unpadded or padded with a gel for comfort. Traditionalistic cyclists' tend to still favour leather, using saddle-soap to keep the leather supple and waterproof.
Mostly leather from cattle, metal parts are usually steel.
cowboys and guachos
Saddles were made with wooden trees. Then, leather was use to make the seats, stirrups, and the girth. This is still the way many saddles today are made. They took a long time to make.
The demand for harnesses made from declined with the advent of the industrial era
The demand for helmets made from declined with the advent of the industrial era
The demand for stirrups made from declined with the advent of the industrial era
Blacksmiths set up shops to make and sell iron tools and saddles. The livery stable and the blacksmith were sometimes operated by the same person. The metal for the saddles was made by the blacksmith, and the leather was usually made by someone else.